Hosmer tuttle



(No Model) H. TUTTLE. INDICATOR LOGK STRIKE.

No. 583,101. Patented May 25,1897.

WITNESSES -f/VV:E./VZ'02 Hosmarfzod 0g 5g flit/M36010, .dllorrzey UNITEDSTATES PATENT OFF CE.

HOSMER TUTTLE, OF CEDAR RAPIDS, IOXVA, ASSIGNOR OF ONE-HALE TO \VILLIAMSMITH, OF SAME PLACE.

INDICATOR-LOOK STRiKE.

S?ECIFIOATION forming part of Letters Patent No. 583,101, dated May 25,1897.

Application filed June 8,1896. Serial No. 594,750 (No n1odcl.

Io aZZ whom it may concern.-

Be it known that I, HOSMER TUTTLE, a citizen'of the United States,residing at Cedar Rapids, in the county of Linn, State of Iowa, haveinvented certain new and useful lmprovements in Indicator-Lock Strikes,of which the following is a specification, reference being had thereinto the accompanying drawings.

My invention relates to indicator-locks having mechanism therein toindicate the number of times that it has been operated; and the objectof my invention is to provide a lockstrike with simple, effective, anddurable means for indicating how many times a lockcarrying door used inconnection therewith may have been opened and closed without modifyingthe construction of an ordinary lock carried by the door. I attain thisobject by the construction illustrated in the accompanying drawings, inwhich- Figure 1 is a front view of the indicatorlock strike. Fig. 2 isalso a front view of the same with a portion of the frame broken away toshow the mechanism therein constructed in accordance with my invention.Fig. 3 is a side view of the same with a portion of the frame brokenaway to show the mechanism therein. Fig. 4 is a horizontal section online x 00 of Fig. 2.

In said drawings, A represents the rectangular hollow frame of thelock-strike. It is substantially like an ordinary lock strike frame, butsomewhat larger and deeper. Its side face has a plate A thereon abouthalf of its width to inclose and in part protect the indicator mechanismwithin the frame. Said mechanism consists of an arm D, pivotallysuspended from its upper end upon a pivotpin d, projecting from theframe in its interior. Said arm carries near its lower end on a pivotpin6 a wheel E, that has a single tooth a projecting from its periphery.Above the wheel E the arm D carries on a pivot-pin b a double wheel ortwo wheels secured to each other, the outer wheel B of which has tenpairs of teeth adapted to engage with the tooth e of the wheel E at theend of each revolution of said wheel E, and the inner wheel B that has asingle tooth b projecting from its periphery. Above the wheel B and inthe same vertical plane the arm D carries on a pivotpin 0 a wheel G,having teeth to engage with the single tooth b of the wheel B so thatfor each revolution of the wheel E the wheels B B will revolve one-tenthof a revolution and for each revolution of the wheels B B the wheel 0will revolve one-tenth of a revolution, as it is usual with theindicators of locks and of other devices.

Attached to the inner face of the wheel E there is a ratchet-wheel Ehaving ten teeth, that is rotated one-tenth of a revolution every timethat the arm D is oscillated. This is accomplished by a pawl F, that hasits upper end pivoted upon a pin f, secured to the frame A, and has itslower end retained into engagement with the teeth of the ratchet-wheelby a coiled spring f having one end pressing against the back of thepawl and its other end against the plate A of the frame. lhere is alsoin engagement with the teeth of the ratchet-wheel E a retainingpawl G,pivoted at g to the arm D. Said pawl is retained in contact with theratchet-wheel by a coiled spring g having one end pressing against thebottom of said pawl and the other end against a lug (Z projecting fromthe side of the arm D. There is also projecting from the side of the armD a pin 7t, that is in frictional contact with the toothless portion ofthe periphery of the wheel E to prevent it from being unduly revolved bythe pawl E.

The lower portion of the arm D is normally advanced toward the open sideof the lockstrike frame by a coiled spring i, having one end bearingagainst the interior surface of said frame and the other end against theedge of said arm. \Vhen the door (used in connection with thelock-strike) is closed and the end of its lockbolt L (shown dotted inFig. 2 enters within the lock-strike, it comes in contact with an arm M,that is secured in its path to the lower end of the arm D and forces thelatter against the spring 1? and oscillates said arm D, causing the pawlF to enter into ongagement with a new tooth of the ratchetwheel EAlthough the arm M is rigidly secured to the arm D, it is adjustablethereon to accommodate any throw of the lock-bolt L. For this purpose itis secured to said arm D by means of a screw m, passing through a slot min the arm D.

Each of the wheels E 13 O has ten successive numerals thereon that canbe read through perforations n in the face of the lock-strike, thenumeral appearing in the presentinstanee being a Zero or thestarting-number of the indicator.

Having now fully described my invention, I claim 1. In combination witha lockstrike frame, an arm pivoted therein, indicator-wheels and aratchet-wheel mounted upon said arm with pawls in engagement with saidratchet-wheel, one end of said pivoted arm being adapted to be forcedbackward by the bolt of an ordinary lock substantially as described.

2. A loelostrike frame provided with indicator mechanism mounted uponapivoted arm

